对SHIBOR作为我国货币市场基准利率的有效性检验

SHIBOR是我国正在培育和发展的基准利率。本文根据国际通行的基准利率标准,运用SHIBOR运行以来的数据,采取理论分析和实证检验的方法,从市场性、基础性、稳定性、可控性、相关性五个方面,对其作为我国货币市场基准利率的有效性进行了全面系统地检验。结果表明,SHIBOR可初步作为基准利率,但有效性偏弱。并提出了改进建议。     

股权激励、制度环境与盈余管理——基于上市公司数据的实证分析

笔者以沪深交易所2006年～2008年所有实施股权激励的A股上市公司数据为样本,实证研究了股权激励与盈余管理之间的关系,研究发现股权激励数量与盈余管理程度显著正相关,行权限制期与盈余管理程度显著负相关。国有上市公司股权激励的盈余管理效应比非国有上市公司明显,市场化程度高的地区上市公司股权激励的盈余管理效应较之于市场化程度低的地区要弱一些。此外,高质量的外部审计可以有效地抑制企业的盈余管理程度。     

The Effects of Public Venture Capital Investments on Corporate Governance: Evidence From IPO Firms in Emerging Markets

This study examines the impact of public venture capital (hereafter PVC) investments on corporate governance of initial public offering (hereafter IPO) firms in emerging markets. Using data collected from Taiwan PVC investments during 1996–2005, we analyse three corporate governance features in IPO firms: earnings management, board characteristics, and excess control by controlling shareholders. We find that PVC‐backed firms use fewer accounting accruals in their IPO financial statements than non‐PVC‐backed firms. This result suggests that PVC‐backed IPO firms engage in less earnings management than non‐PVC‐backed IPO firms. We also find PVC‐backed firms tend to set up their boards with fewer non‐independent directors and supervisors at IPO. This result indicates that PVC‐backed IPO firms have better board structures than non‐PVC‐backed IPO firms. Finally, we find that controlling shareholders are less likely to exert excess control in PVC‐backed firms than in non‐PVC‐backed firms. Overall, our results indicate that PVC investments add value to new IPO firms not only in financing their capital needs but also in creating better corporate governance structures in emerging markets.     

Accounting Conservatism and the Temporal Trends in Current Earnings’ Ability to Predict Future Cash Flows versus Future Earnings: Evidence on the Trade‐off between Relevance and Reliability*

This research reports that an increasing level of accounting conservatism over the 1973–2005 period is associated with: (1) an increase in the ability of current earnings to predict future cash flows and (2) a decrease in the ability of current earnings to predict future earnings. We also find that usefulness of earnings for explaining stock prices over book values is positively related to reliability but not to relevance. Our results hold for the constant and full samples in both in‐sample and out‐of‐sample analyses and are robust to the use of alternative measures for relevance, reliability, earnings usefulness, and conservatism. Our findings about the relations among conservatism, relevance, reliability, and usefulness suggest a trade‐off between relevance and reliability and seem to indicate that the adoption of an increasing number of conservative accounting standards has a possible adverse impact on earnings usefulness through a negative effect on reliability.     

Do Short Sellers Target Firms with Poor Earnings Quality? Evidence from Earnings Restatements

We study the behavior of short sellers around earnings restatements. We find that short sellers accumulate positions in restating firms several months in advance of the restatement and subsequently unwind these positions after the drop in share price induced by the restatement. The increase in short interest is larger for firms with high levels of accruals prior to restatement. We document that heavily shorted firms experience poor subsequent performance and a higher rate of delisting. Overall, these results suggest that the motive for short selling is, at least in part, related to suspect financial reporting and that short sellers pay attention to information being conveyed by accruals.

竞赛机制设计研究回顾与展望

竞赛是社会、政治和经济中的典型现象,在激励和资源配置方面发挥了非常重要的作用,竞赛机 制设计已成为竞赛研究的理论热点问题。本文介绍了竞赛理论基础知识,主要从竞赛奖励、竞赛结构及 竞赛成功函数三个方面,综述了有关竞赛机制设计研究。在回顾以往研究的基础上,探讨了竞赛机制设 计研究未来的可能发展方向。     

Affiliated block shareholders and analyst optimism

We investigate several previously under-documented conflicts of interest that may result in analyst optimism by utilizing two unique features of brokerage firms in China, namely, the dominant ownership of large shareholders within the brokerage firms and the mandatory disclosure of brokerage firms’ commission income derived from each mutual fund client. We show that controlling shareholders of an analyst’s brokerage-firm put pressure on the analyst to report more optimistically biased earnings forecasts and recommendations to the stocks they hold larger positions in. We also find that the magnitude of analyst optimism increases with the shareholdings of the mutual funds that contribute commission fees to the analyst’s brokerage firm. These findings remain robust after incorporating a regulation change that reduces conflicts of interest in the brokerage industry and higher dimensional fixed effects, and thus are unlikely to be driven by reverse causality or omitted variable bias.     

How efficient is the market for Australian firms’ earnings information?

We construct a measure of the speed with which forecasts issued by sell-side analysts accurately forecast future annual earnings. Following Marshall, we label this measure earnings information flow timeliness (EIFT). This measure avoids the aggregation problem inherent in price-based measures of information efficiency. We document large variation in EIFT across firm-years, and show that EIFT is positively associated with the extent of analyst following, consistent with increased analyst coverage improving the speed with which earnings-related information is recognised. We also find that EIFT is higher for firm-years classified as ‘bad news’ (i.e., where analysts’ forecasts at the start of the financial period exceed the reported outcome). However, when we separately consider instances where analysts appear to forecast non-GAAP (or ‘street’) earnings rather than GAAP earnings, we find that the greater timeliness of bad news is concentrated among observations where analysts forecast non-GAAP earnings, where unusual items are typically excluded. We conclude that the market for accounting information is more efficient for negative operating outcomes than for negative outcomes reflecting unusual items.     

社保基金持股与企业盈余质量:A股上市公司的证据

本文利用中国A股上市公司2006-2015年的数据,研究社保基金持股对上市公司盈余质量的影响。我们用上市公司财务重述作为测度盈余质量的指标,发现社保基金持股能够显著降低企业发布财务重述的概率,这表明社保基金对上市公司盈余质量的提高具有促进作用。并且,社保基金的这一治理作用在国有企业、内部治理水平较差以及市场化程度较低地区的上市公司中更加显著。通过双重差分模型和安慰剂检验等方法弱化了内生性问题之后,以上结论依然成立,说明社保基金持股和盈余质量提升之间存在因果关系,我们称之为社保基金的公司治理作用。进一步研究发现,社保基金可以通过抑制控股股东资金占用、增加机构调研次数等途径提升被持股公司的盈余质量。本文有助于认识和评估社保基金持股对于上市公司的监督与治理作用。     

Cross-sectional tests of asset pricing models with full-rank mimicking portfolios

In the standard tests of asset pricing models, factor risk premia are estimated on a test asset span so that models are tested with degrees of freedom reduced by the number of factors. Risk premia of traded factors can be further restricted to be equal to their expected returns, but such restrictions cannot be imposed on models with nontraded factors, which may create a problem of testing without full restrictions or on unequal asset spans across models. We propose a full-rank mimicking portfolio approach by projecting nontraded factors onto a combined span of test assets and benchmark traded factors. Under the Hansen-Jagannathan distance framework, we demonstrate that full-rank mimicking portfolios can provide improved power and fair performance comparison against a benchmark model in both specification and model comparison tests.